In fact the whole UEFI in general I think it is a clusterfuck of mishmashed random ideas, some good, many bad.
What I intend to do personally, is attempt to don't use secure boot.
And this all might explain the e-mail I got from Lenovo 10 minutes ago...
I asked them for a non-Windows machine. They replied saying that they from now on only manufacture machines with Windows. At first I was: "wtf? why?" now this article remembered me that now we have firmware tied to Microsoft, and this explains then why ThinkPads must come with Windows.
Here in Brazil this is illegal, and Lenovo for example got sued (and lost) once. I hope a rain of lawsuits make this shit stop.